50
50
Sep 21, 2013
09/13
by
Mark I Frost; Jason Surace; Leonidas A Moustakas; Jessica Krick
texts
eye 50
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We have undertaken a systematic search for candidate supernovae from high-redshift Population III stars in a field that has been observed with repeated imaging on a cadence of 2-3 weeks over a 2.2 year baseline, the Spitzer/IRAC Dark Field. The individual epochs reach a typical 5-sigma depth of 1 uJy in IRAC Channel 1 (3.6 um). Requiring a minimum of four epochs coverage, the total effective area searched is 214 sq arcminutes. The unprecedented depth and multi-epochal nature of these data make...
Source: http://arxiv.org/abs/0905.4494v1
65
65
Sep 20, 2013
09/13
by
Kalliopi M. Dasyra; Lin Yan; George Helou; Jason Surace; Anna Sajina; James Colbert
texts
eye 65
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We present Hubble Space Telescope NICMOS H-band imaging of 33 Ultraluminous Infrared Galaxies (ULIRGs) at z~2 that were selected from the 24 micron catalog of the Spitzer Extragalactic First Look Survey. The images reveal that at least 17 of the 33 objects are associated with interactions. Up to one fifth of the sources in our sample could be minor mergers whereas only 2 systems are merging binaries with luminosity ratio
Source: http://arxiv.org/abs/0802.1050v2
61
61
Sep 22, 2013
09/13
by
Michel Zamojski; Lin Yan; Kalliopi Dasyra; Anna Sajina; Jason Surace; Tim Heckman; George Helou
texts
eye 61
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We present new results on the physical nature of infrared-luminous sources at 0.5 0.9 mJy. We find many (~60%) of our sources to possess an important bulge and/or central point source component, most of which reveal additional underlying structures after subtraction of a best-fit sersic (or sersic+PSF) profile. Based on visual inspection of the NIC2 images and their residuals, we estimate that ~80% of all our sources are mergers. We calculate lower and upper limits on the merger fraction to be...
Source: http://arxiv.org/abs/1101.2368v1
53
53
Sep 23, 2013
09/13
by
Krzysztof Findeisen; Lynne Hillenbrand; Eran Ofek; David Levitan; Branimir Sesar; Russ Laher; Jason Surace
texts
eye 53
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We present first results from a new, multiyear, time domain survey of young stars in the North America Nebula complex using the Palomar Transient Factory. Our survey is providing an unprecedented view of aperiodic variability in young stars on timescales of days to years. The analyzed sample covers R_PTF = 13.5-18 and spans a range of mid-infrared color, with larger-amplitude optical variables (exceeding 0.4 mag root-mean-squared) more likely to have mid-infrared evidence for circumstellar...
Source: http://arxiv.org/abs/1303.3629v1
51
51
Sep 20, 2013
09/13
by
Lin Yan; Anna Sajina; Dario Fadda; Phil Choi; Lee Armus; George Helou; Harry Teplitz; David Frayer; Jason Surace
texts
eye 51
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We present the mid-infrared (MIR) spectra obtained with the Spitzer InfraRed Spectrograph (IRS) for a sample of 52 sources, selected as infrared luminous, z>1 candidates in the Extragalactic First Look Survey (XFLS). The sample selection criteria are f(24um) > 0.9mJy, nu fnu(24um)/nu fnu(8um) > 3.16 and nu fnu(24um)/nu fnu(0.7um) > 10. Of the 52 spectra, 47 (90%) produced measurable redshifts based solely on the mid-IR spectral features, with the majority (35/47=74%) at 1.5 1. Their...
Source: http://arxiv.org/abs/astro-ph/0612297v1
64
64
Sep 20, 2013
09/13
by
Ricardo Demarco; Gillian Wilson; Adam Muzzin; Mark Lacy; Jason Surace; H. K. C. Yee; Henk Hoekstra; Kris Blindert; David Gilbank
texts
eye 64
favorite 0
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The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a z'-passband imaging survey of the 50 deg^2 Spitzer SWIRE Legacy fields, designed with the primary aim of creating the first large, homogeneously selected sample of massive clusters at z>1. SpARCS uses an infrared adaptation of the two-filter cluster red-sequence technique. In this paper we report Keck/LRIS spectroscopic confirmation of two new exceptionally rich galaxy clusters, SpARCS J161315+564930 at z=0.871+/-0.002,...
Source: http://arxiv.org/abs/1002.0160v1
99
99
Jul 20, 2013
07/13
by
Gillian Wilson; Adam Muzzin; Mark Lacy; Howard Yee; Jason Surace; Carol Lonsdale; Henk Hoekstra; Subhabrata Majumdar; David Gilbank; Mike Gladders
texts
eye 99
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As the densest galaxy environments in the universe, clusters are vital to our understanding of the role that environment plays in galaxy formation and evolution. Unfortunately, the evolution of high-redshift cluster galaxies is poorly understood because of the ``cluster desert'' that exists at 1 < z < 2. The SpARCS collaboration is currently carrying out a 1-passband (z') imaging survey which, when combined with the pre-existing 50 square degree 3.6 micron Spitzer SWIRE Legacy Survey...
Source: http://arxiv.org/abs/astro-ph/0604289v1
3
3.0
Jun 30, 2018
06/18
by
David Levitan; Paul J. Groot; Thomas A. Prince; Shrinivas R. Kulkarni; Russ Laher; Eran O. Ofek; Branimir Sesar; Jason Surace
texts
eye 3
favorite 0
comment 0
The AM CVn systems are a class of He-rich, post-period minimum, semi-detached, ultra-compact binaries. Their long-term light curves have been poorly understood due to the few systems known and the long (hundreds of days) recurrence times between outbursts. We present combined photometric light curves from the LINEAR, CRTS, and PTF synoptic surveys to study the photometric variability of these systems over an almost 10 yr period. These light curves provide a much clearer picture of the outburst...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1410.6987
4
4.0
Jun 29, 2018
06/18
by
Chan-Kao Chang; Hsing-Wen Lin; Wing-Huen Ip; Thomas A. Prince; Shrinivas R. Kulkarni; David Levitan; Russ Laher; Jason Surace
texts
eye 4
favorite 0
comment 0
In order to look for large super-fast rotators, five dedicated surveys covering ~ 188 square degree in the ecliptic plane have been carried out in R-band with ~10 min cadence using the intermediate Palomar Transient Factory in late 2014 and early 2015. Among 1029 reliable rotation periods obtained from the surveys, we discovered one new large super-fast rotator, (40511) 1999 RE88, and other 18 candidates. (40511) 1999 RE88 is an S-type inner main-belt asteroid with a diameter of D = 1.9 +- 0.3...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1608.07910
5
5.0
Jun 29, 2018
06/18
by
Kevin R. Covey; Marcel A. Agüeros; Nicholas M. Law; Jiyu Liu; Aida Ahmadi; Russ Laher; David Levitan; Branimir Sesar; Jason Surace
texts
eye 5
favorite 0
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Stellar rotation periods measured in open clusters have proved to be extremely useful for studying stars' angular momentum content and rotationally driven magnetic activity, which are both age- and mass-dependent processes. While period measurements have been obtained for hundreds of solar-mass members of the Pleiades, period measurements exist for only a few low-mass ($
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1601.07237
3
3.0
Jun 30, 2018
06/18
by
Chan-Kao Chang; Adam Waszczak; Hsing-Wen Lin; Wing-Huen Ip; Thomas. A. Prince; Shrinivas R. Kulkarni; Russ Laher; Jason Surace
texts
eye 3
favorite 0
comment 0
Asteroids of size larger than 150 m generally do not have rotation periods smaller than 2.2 hours. This spin cutoff is believed to be due to the gravitationally bound rubble-pile structures of the asteroids. Rotation with periods exceeding this critical value will cause asteroid breakup. Up until now, only one object, 2001 OE84, has been found to be an exception to this spin cutoff. We report the discovery of a new super-fast rotator, (335433) 2005 UW163, spinning with a period of 1.290 hours...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1407.8264
36
36
Jun 29, 2018
06/18
by
Adam Waszczak; Thomas A. Prince; Russ Laher; Frank Masci; Brian Bue; Umaa Rebbapragada; Tom Barlow; Jason Surace; George Helou; Shrinivas Kulkarni
texts
eye 36
favorite 0
comment 0
Near-Earth asteroids (NEAs) in the 1-100 meter size range are estimated to be $\sim$1,000 times more numerous than the $\sim$15,000 currently-catalogued NEAs, most of which are in the 0.5-10 kilometer size range. Impacts from 10-100 meter size NEAs are not statistically life-threatening but may cause significant regional damage, while 1-10 meter size NEAs with low velocities relative to Earth are compelling targets for space missions. We describe the implementation and initial results of a...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1609.08018
88
88
Sep 22, 2013
09/13
by
Hendrik Hildebrandt; Adam Muzzin; Thomas Erben; Henk Hoekstra; Konrad Kuijken; Jason Surace; Ludovic van Waerbeke; Gillian Wilson; Howard K. C. Yee
texts
eye 88
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We introduce a novel method to measure the masses of galaxy clusters at high redshift selected from optical and IR Spitzer data via the red-sequence technique. Lyman-break galaxies are used as a well understood, high-redshift background sample allowing mass measurements of lenses at unprecedented high redshifts using weak lensing magnification. By stacking a significant number of clusters at different redshifts with average masses of ~1-3x10^14M_sun, as estimated from their richness, we can...
Source: http://arxiv.org/abs/1103.4407v2
3
3.0
Jun 29, 2018
06/18
by
Chow-Choong Ngeow; Po-Chieh Yu; Eric Bellm; Ting-Chang Yang; Chan-Kao Chang; Adam Miller; Russ Laher; Jason Surace; Wing-Huen Ip
texts
eye 3
favorite 0
comment 0
The wide-field synoptic sky surveys, known as the Palomar Transient Factory (PTF) and the intermediate Palomar Transient Factory (iPTF), will accumulate a large number of known and new RR Lyrae. These RR Lyrae are good tracers to study the substructure of the Galactic halo if their distance, metallicity, and galactocentric velocity can be measured. Candidates of halo RR Lyrae can be identified from their distance and metallicity before requesting spectroscopic observations for confirmation....
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1612.03366
75
75
Sep 20, 2013
09/13
by
C. Kevin Xu; Donovan Domingue; Yi-Wen Cheng; Nanyao Lu; Jiasheng Huang; Yu Gao; Joseph M. Mazzarella; Roc Cutri; Wei-Hsin Sun; Jason Surace
texts
eye 75
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We present Spitzer observations for a sample of close major-merger galaxy pairs (KPAIR sample) selected from 2MASS/SDSS-DR3 cross-matches. The goals are to study the star formation activity in these galaxies and to set a local bench mark for the cosmic evolution of close major mergers. The Spitzer KPAIR sample (27 pairs, 54 galaxies) includes all spectroscopically confirmed S+S and S+E pairs in a parent sample that is complete for primaries brighter than K=12.5 mag, projected separations of 5...
Source: http://arxiv.org/abs/1002.3648v1
24
24
Jun 28, 2018
06/18
by
Tracy Webb; Adam Muzzin; Allison Noble; Nina Bonaventura; James Geach; Yashar Hezevah; Chris Lidman; Gillian Wilson; H. K. C. Yee; Jason Surace; David Shupe
texts
eye 24
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We present the results of a MIPS-24um study of the Brightest Cluster Galaxies (BCGs) of 535 high-redshift galaxy clusters. The clusters are drawn from the Spitzer Adaptation of the Red-Sequence Cluster Survey (SpARCS), which effectively provides a sample selected on total stellar mass, over 0.2 < z < 1.8 within the Spitzer Wide-Area Infrared Extragalactic (SWIRE) Survey fields. 20%, or 106 clusters have spectroscopically confirmed redshifts, and the rest have redshifts estimated from the...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1508.07302
42
42
Sep 22, 2013
09/13
by
Duncan Farrah; Carol Lonsdale; Colin Borys; Fan Fang; Ian Waddington; Seb Oliver; Michael Rowan-Robinson; Tom Babbedge; David Shupe; Mari Polletta; Harding Smith; Jason Surace
texts
eye 42
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We present measurements of the spatial clustering of galaxies with stellar masses >10^11Msun, infrared luminosities >10^12 Lsun, and star formation rates >200Msun per year in two redshift intervals; 1.51, both starbursts and AGN. Adopting plausible models for the growth of DM haloes with redshift, then the haloes hosting the 21 signpost stellar buildup in galaxies that will reside in clusters at z=0, with ULIRGs at increasing redshifts signposting the buildup of stars in galaxies that...
Source: http://arxiv.org/abs/astro-ph/0603061v2
4
4.0
Jun 30, 2018
06/18
by
P. C. Yu; C. C. Lin; W. P. Chen; C. D. Lee; W. H. Ip; C. C. Ngeow; Russ Laher; Jason Surace; Shrinivas R. Kulkarni
texts
eye 4
favorite 0
comment 0
We present Be star candidates in the open cluster NGC\,663, identified by H$\alpha$ imaging photometry with the Palomar Transient Factory Survey, as a pilot program to investigate how the Be star phenomena, the emission spectra, extended circumstellar envelopes, and fast rotation, correlate with massive stellar evolution. Stellar membership of the candidates was verified by 2MASS magnitudes and colors, and by proper motions. We discover 4 new Be stars and exclude one known Be star from being a...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1411.5496
4
4.0
Jun 30, 2018
06/18
by
Sara M. Petty; Lee Armus; Vassilis Charmandaris; Aaron S. Evans; Emeric Le Floc'h; Carrie Bridge; Tanio Díaz-Santos; Justin Howell; Hanae Inami; Alexandros Psychogyios; Sabrina Stierwalt; Jason Surace
texts
eye 4
favorite 0
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We compare the morphologies of a sample of 20 LIRGs from the Great Observatories All-sky LIRG Survey (GOALS) in the FUV, B, I and H bands, using the Gini (G) and M20 parameters to quantitatively estimate the distribution and concentration of flux as a function of wavelength. HST images provide an average spatial resolution of ~80 pc. While our LIRGs can be reliably classified as mergers across the entire range of wavelengths studied here, there is a clear shift toward more negative M20 (more...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1408.2511
40
40
Sep 19, 2013
09/13
by
Belinda J. Wilkes; Roy Kilgard; Dong-Woo Kim; Minsun Kim; Mari Polletta; Carol Lonsdale; Harding E. Smith; Jason Surace; Frazer N. Owen; A. Franceschini; Brian Siana; David Shupe
texts
eye 40
favorite 0
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We report a moderate-depth (70 ksec), contiguous 0.7 sq.deg, Chandra survey, in the Lockman Hole Field of the Spitzer/SWIRE Legacy Survey coincident with a completed, ultra-deep VLA survey with deep optical and near-infrared imaging in-hand. The primary motivation is to distinguish starburst galaxies and AGN, including the significant, highly obscured (log N_H >23) subset. Chandra has detected 775 X-ray sources to a limiting broad band (0.3-8 keV) flux ~4E-16 erg/cm^2/s. We present the X-ray...
Source: http://arxiv.org/abs/0910.2675v1
42
42
Sep 23, 2013
09/13
by
Adam Muzzin; Gillian Wilson; H. K. C. Yee; Henk Hoekstra; David Gilbank; Jason Surace; Mark Lacy; Kris Blindert; Subhabrata Majumdar; Ricardo Demarco; Jonathan P. Gardner; Mike Gladders; Carol Lonsdale
texts
eye 42
favorite 0
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The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a deep z'-band imaging survey covering the Spitzer SWIRE Legacy fields designed to create the first large homogeneously-selected sample of massive clusters at z > 1 using an infrared adaptation of the cluster red-sequence method. We present an overview of the northern component of the survey which has been observed with CFHT/MegaCam and covers 28.3 deg^2. The southern component of the survey was observed with...
Source: http://arxiv.org/abs/0810.0005v1
54
54
Sep 23, 2013
09/13
by
Sumin Tang; Yi Cao; Lars Bildsten; Peter Nugent; Eric Bellm; Shrinivas R. Kulkarni; Russ Laher; David Levitan; Frank Masci; Eran O. Ofek; Thomas A. Prince; Branimir Sesar; Jason Surace
texts
eye 54
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We report the discovery of R Coronae Borealis (RCB) stars in the Andromeda galaxy (M31) using the Palomar Transient Factory (PTF). RCB stars are rare hydrogen-deficient, carbon-rich supergiant variables, most likely the merger products of two white dwarfs. These new RCBs, including two confirmed ones and two candidates, are the first to be found beyond the Milky Way and the Magellanic Clouds. All of M31 RCBs showed >1.5 mag irregular declines over timescales of weeks to months. Due to the...
Source: http://arxiv.org/abs/1303.1820v2
64
64
Sep 19, 2013
09/13
by
William T. Reach; S. T. Megeath; Martin Cohen; J. Hora; Sean Carey; Jason Surace; S. P. Willner; P. Barmby; Gillian Wilson; William Glaccum; Patrick Lowrance; Massimo Marengo; Giovanni G. Fazio
texts
eye 64
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The Infrared Array Camera (IRAC) on the Spitzer Space Telescope is absolutely calibrated by comparing photometry on a set of A stars near the north ecliptic pole to predictions based on ground-based observations and a stellar atmosphere model. The brightness of point sources is calibrated to an accuracy of 3%, relative to models for A star stellar atmospheres, for observations performed and analyzed in the same manner as the calibration stars. This includes corrections for location of the star...
Source: http://arxiv.org/abs/astro-ph/0507139v2
52
52
Sep 23, 2013
09/13
by
Gillian Wilson; Adam Muzzin; H. K. C. Yee; Mark Lacy; Jason Surace; David Gilbank; Kris Blindert; Henk Hoekstra; Subhabrata Majumdar; Ricardo Demarco; Jonathan P. Gardner; Michael D. Gladders; Carol Lonsdale
texts
eye 52
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The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a z'-passband imaging survey, consisting of deep (z' ~ 24 AB) observations made from both hemispheres using the CFHT 3.6m and CTIO 4m telescopes. The survey was designed with the primary aim of detecting galaxy clusters at z >~ 1. In tandem with pre-existing 3.6um observations from the Spitzer Space Telescope SWIRE Legacy Survey, SpARCS detects clusters using an infrared adaptation of the two-filter red-sequence cluster...
Source: http://arxiv.org/abs/0810.0036v1
77
77
Jul 20, 2013
07/13
by
Tanio Diaz-Santos; Vassilis Charmandaris; Lee Armus; Sabrina Stierwalt; Sebastian Haan; Joseph Mazzarella; Justin Howell; Sylvain Veilleux; Eric Murphy; Andreea Petric; Philip N. Appleton; Aaron S. Evans; David Sanders; Jason Surace
texts
eye 77
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We present results from the second part of our analysis of the extended mid-infrared (MIR) emission of the Great Observatories All-Sky LIRG Survey (GOALS) sample based on 5-14 micron low-resolution spectra obtained with the IRS on Spitzer. We calculate the fraction of extended emission as a function of wavelength for all galaxies in the sample, FEE_lambda, and spatially separate the MIR spectrum of galaxies into their nuclear and extended components. We find that the [NeII] emission line is as...
Source: http://arxiv.org/abs/1107.5958v1
21
21
Jun 27, 2018
06/18
by
Adam Waszczak; Chan-Kao Chang; Eran O. Ofek; Russ Laher; Frank Masci; David Levitan; Jason Surace; Yu-Chi Cheng; Wing-Huen Ip; Daisuke Kinoshita; George Helou; Thomas A. Prince; Shrinivas Kulkarni
texts
eye 21
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We fit 54,296 sparsely-sampled asteroid lightcurves in the Palomar Transient Factory to a combined rotation plus phase-function model. Each lightcurve consists of 20+ observations acquired in a single opposition. Using 805 asteroids in our sample that have reference periods in the literature, we find the reliability of our fitted periods is a complicated function of the period, amplitude, apparent magnitude and other attributes. Using the 805-asteroid ground-truth sample, we train an automated...
Topics: Astrophysics, Earth and Planetary Astrophysics
Source: http://arxiv.org/abs/1504.04041
97
97
Jul 20, 2013
07/13
by
Adam K. Leroy; Aaron S. Evans; Emmanuel Momjian; Eric Murphy; Juergen Ott; Lee Armus; James Condon; Sebastian Haan; Joseph M. Mazzarella; David S. Meier; George C. Privon; Eva Schinnerer; Jason Surace; Fabian Walter
texts
eye 97
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We use the Expanded Very Large Array to image radio continuum emission from local luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) in 1 GHz windows centered at 4.7, 7.2, 29, and 36 GHz. This allows us to probe the integrated radio spectral energy distribution (SED) of the most energetic galaxies in the local universe. The 4-8 GHz flux densities agree well with previous measurements. They yield spectral indices \alpha \approx -0.67 (where F_\nu \propto \nu^\alpha) with \pm 0.15...
Source: http://arxiv.org/abs/1107.4109v1
53
53
Sep 20, 2013
09/13
by
Seb Oliver; Ian Waddington; Eduardo Gonzalez-Solares; Jason Surace; Fan Fang; Dave Shupe; Tom Jarrett; Carol Lonsdale; Cong Kevin Xu; Duncan Farrah; Malcolm Salaman; Michael Rowan-Robinson; Brian Siana; H. E. Gene Smith
texts
eye 53
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We present the first analysis of large-scale clustering from the Spitzer Wide-area InfraRed Extragalactic legacy survey: SWIRE. We compute the angular correlation function of galaxies selected to have 3.6 micron fluxes brighter than 32 muJy in three fields totaling two square degrees in area. In each field we detect clustering with a high level of significance. The amplitude and slope of the correlation function is consistent between the three fields and is modeled as...
Source: http://arxiv.org/abs/astro-ph/0405592v1
51
51
Sep 23, 2013
09/13
by
David Levitan; Thomas Kupfer; Paul J. Groot; Shrinivas R. Kulkarni; Thomas A. Prince; Gregory V. Simonian; Iair Arcavi; Joshua S. Bloom; Russ Laher; Peter E. Nugent; Eran O. Ofek; Branimir Sesar; Jason Surace
texts
eye 51
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We present five new outbursting AM CVn systems and one candidate discovered as part of an ongoing search for such systems using the Palomar Transient Factory (PTF). This is the first large-area, systematic search for AM CVn systems using only large-amplitude photometric variability to select candidates. Three of the confirmed systems and the candidate system were discovered as part of the PTF transient search. Two systems were found as part of a search for outbursts through the PTF photometric...
Source: http://arxiv.org/abs/1212.5312v1
13
13
Jun 28, 2018
06/18
by
Chan-Kao Chang; Wing-Huen Ip; Hsing-Wen Lin; Yu-Chi Cheng; Chow-Choong Ngeow; Ting-Chang Yang; Adam Waszczak; Shrinivas R. Kulkarni; David Levitan; Branimir Sesar; Russ Laher; Jason Surace; Thomas. A. Prince
texts
eye 13
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Two dedicated asteroid rotation-period surveys have been carried out using data taken on January 6-9 and February 20-23 of 2014 by the Intermediate Palomar Transient Factory (iPTF) in the $R$~band with $\sim 20$-min cadence. The total survey area covered 174~deg$^2$ in the ecliptic plane. Reliable rotation periods for 1,438 asteroids are obtained from a larger data set of 6,551 mostly main-belt asteroids, each with $\geq 10$~detections. Analysis of 1751, PTF based, reliable rotation periods...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1506.08493
353
353
Sep 17, 2013
09/13
by
Brian Siana; Maria del Carmen Polletta; Harding E. Smith; Carol J. Lonsdale; Eduardo Gonzalez-Solares; Duncan Farrah; Tom S. R. Babbedge; Michael Rowan-Robinson; Jason Surace; David Shupe; Fan Fang; Alberto Franceschini; Seb Oliver
texts
eye 353
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We use a simple optical/infrared (IR) photometric selection of high-redshift QSOs that identifies a Lyman Break in the optical photometry and requires a red IR color to distinguish QSOs from common interlopers. The search yields 100 z~3 (U-dropout) QSO candidates with 19
Source: http://arxiv.org/abs/0711.0211v1
45
45
Sep 23, 2013
09/13
by
Ray P. Norris; Jose Afonso; Antonio Cava; Duncan Farrah; Minh T. Huynh; R. J. Ivison; Matt Jarvis; Mark Lacy; Minnie Mao; Claudia Maraston; Jean-Christophe Mauduit; Enno Middelberg; Seb Oliver; Nick Seymour; Jason Surace
texts
eye 45
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Infrared-faint radio sources (IFRSs) are a rare class of object which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of a sample of these sources taken as part of the Spitzer Extragalactic Representative Volume Survey (SERVS). Nearly all the IFRSs are undetected at a level of ~ 1 \mu$Jy in these new deep observations, and even the detections are consistent with confusion with unrelated galaxies....
Source: http://arxiv.org/abs/1105.0960v1
4
4.0
Jun 30, 2018
06/18
by
David Levitan; Thomas Kupfer; Paul J. Groot; Bruce Margon; Thomas A. Prince; Shrinivas R. Kulkarni; Gregg Hallinan; Leon K. Harding; Gillian Kyne; Russ Laher; Eran O. Ofek; René G. M. Rutten; Branimir Sesar; Jason Surace
texts
eye 4
favorite 0
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We report on PTF1 J191905.19+481506.2, a newly discovered, partially eclipsing, outbursting AM CVn system found in the Palomar Transient Factory synoptic survey. This is only the second known eclipsing AM CVn system. We use high-speed photometric observations and phase-resolved spectroscopy to establish an orbital period of 22.4559(3) min. We also present a long-term light curve and report on the normal and super-outbursts regularly seen in this system, including a super-outburst recurrence...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1402.7129
8
8.0
Jun 30, 2018
06/18
by
Chan-Kao Chang; Wing-Huen Ip; Hsing-Wen Lin; Yu-Chi Cheng; Chow-Choong Ngeow; Ting-Chang Yang; Adam Waszczak; Shrinivas R. Kulkarni; David Levitan; Branimir Sesar; Russ Laher; Jason Surace; Thomas. A. Prince; the PTF Team
texts
eye 8
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A new asteroid rotation period survey have been carried out by using the Palomar Transient Factory (PTF). Twelve consecutive PTF fields, which covered an area of 87 deg$^2$ in the ecliptic plane, were observed in $R$ band with a cadence of $\sim$20 min during February 15--18, 2013. We detected 2500 known asteroids with a diameter range of 0.5 km $\leq D \leq$ 200 km. Of these, 313 objects had highly reliable rotation periods and exhibited the "spin barrier" at $\sim2$ hours. In...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1405.1144
57
57
Sep 20, 2013
09/13
by
Michael Rowan-Robinson; Tom Babbedge; Seb Oliver; Markos Trichas; Stefano Berta; Carol Lonsdale; Gene Smith; David Shupe; Jason Surace; Stephane Arnouts; Olivier LeFevre; Alejandro Afonso-Luis; Ismael Perez-Fournon; Evanthia Hatziminaoglou; Maria Polletta; Duncan Farrah; Mattia Vaccari
texts
eye 57
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We present the SWIRE Photometric Redshift Catalogue, 1025119 redshifts of unprecedented reliability and accuracy. Our method is based on fixed galaxy and QSO templates applied to data at 0.36-4.5 mu, and on a set of 4 infrared emission templates fitted to infrared excess data at 3.6-170 mu. The code involves two passes through the data, to try to optimize recognition of AGN dust tori. A few carefully justified priors are used and are the key to supression of outliers. Extinction, A_V, is...
Source: http://arxiv.org/abs/0802.1890v4
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79
Sep 20, 2013
09/13
by
Payam Davoodi; Francesca Pozzi; Seb Oliver; Mari Polletta; Alejandro Afonso-Luis; Duncan Farrah; Evanthia Hatziminaoglou; Giulia Rodighiero; Stefano Berta; Ian Waddington; Carol Lonsdale; Michael Rowan-Robinson; Dave L. Shupe; Tracey Evans; Fan Fang; H. E. Smith; Jason Surace
texts
eye 79
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We present the rest-frame optical and infrared colours of a complete sample of 1114 z
Source: http://arxiv.org/abs/astro-ph/0607103v1
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55
Sep 24, 2013
09/13
by
Adam Muzzin; Gillian Wilson; H. K. C. Yee; David Gilbank; Henk Hoekstra; Ricardo Demarco; Michael Balogh; Pieter van Dokkum; Marijn Franx; Erica Ellingson; Amalia Hicks; Julie Nantais; Allison Noble; Mark Lacy; Chris Lidman; Alessandro Rettura; Jason Surace; Tracy Webb
texts
eye 55
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We evaluate the effects of environment and stellar mass on galaxy properties at 0.85 < z < 1.20 using a 3.6um-selected spectroscopic sample of 797 cluster and field galaxies drawn from the GCLASS survey. We confirm that for galaxies with LogM* > 9.3 the well-known correlations between environment and properties such as star-forming fraction (f_SF), SFR, SSFR, D(4000), and color are already in place at z ~ 1. We separate the effects of environment and stellar mass on galaxies by...
Source: http://arxiv.org/abs/1112.3655v1
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18
Jun 28, 2018
06/18
by
Nora L. Strotjohann; Eran O. Ofek; Avishay Gal-Yam; Mark Sullivan; Shrinivas R. Kulkarni; Nir J. Shaviv; Christoffer Fremling; Mansi M. Kasliwal; Peter E. Nugent; Yi Cao; Iair Arcavi; Jesper Sollerman; Alexei V. Filippenko; Ofer Yaron; Russ Laher; Jason Surace
texts
eye 18
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The progenitor stars of several Type IIb supernovae (SNe) show indications for extended hydrogen envelopes. These envelopes might be the outcome of luminous energetic pre-explosion events, so-called precursor eruptions. We use the Palomar Transient Factory (PTF) pre-explosion observations of a sample of 27 nearby Type IIb SNe to look for such precursors during the final years prior to the SN explosion. No precursors are found when combining the observations in 15-day bins, and we calculate the...
Topics: High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1508.04775
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114
Sep 18, 2013
09/13
by
Joseph L. Hora; Sean Carey; Jason Surace; Massimo Marengo; Patrick Lowrance; William J. Glaccum; Mark Lacy; William T. Reach; William F. Hoffmann; Pauline Barmby; S. P. Willner; Giovanni G. Fazio; S. Thomas Megeath; Lori E. Allen; Bidushi Bhattacharya; Manuel Quijada
texts
eye 114
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We present several corrections for point source photometry to be applied to data from the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. These corrections are necessary because of characteristics of the IRAC arrays and optics and the way the instrument is calibrated in-flight. When these corrections are applied, it is possible to achieve a ~2% relative photometric accuracy for sources of adequate signal to noise in an IRAC image.
Source: http://arxiv.org/abs/0809.3411v1
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6.0
Jun 29, 2018
06/18
by
Frank Masci; Russ Laher; Umaa Rebbapragada; Gary Doran; Adam Miller; Eric Bellm; Mansi Kasliwal; Eran Ofek; Jason Surace; David Shupe; Carl Grillmair; Ed Jackson; Tom Barlow; Lin Yan; Yi Cao; S. Bradley Cenko; Lisa Storrie-Lombardi; George Helou; Thomas Prince; Shrinivas Kulkarni
texts
eye 6
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We describe the near real-time transient-source discovery engine for the intermediate Palomar Transient Factory (iPTF), currently in operations at the Infrared Processing and Analysis Center (IPAC), Caltech. We coin this system the IPAC/iPTF Discovery Engine (or IDE). We review the algorithms used for PSF-matching, image subtraction, detection, photometry, and machine-learned (ML) vetting of extracted transient candidates. We also review the performance of our ML classifier. For a limiting...
Topics: Astrophysics, Instrumentation and Methods for Astrophysics
Source: http://arxiv.org/abs/1608.01733
12
12
Jun 30, 2018
06/18
by
Sumin Tang; Lars Bildsten; William M. Wolf; K. L. Li; Albert K. H. Kong; Yi Cao; S. Bradley Cenko; Annalisa De Cia; Mansi M. Kasliwal; Shrinivas R. Kulkarni; Russ Laher; Frank Masci; Peter E. Nugent; Daniel A. Perley; Thomas A. Prince; Jason Surace
texts
eye 12
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The iPTF detection of the most recent outburst of the recurrent nova system RX J0045.4+4154 in the Andromeda Galaxy has enabled the unprecedented study of a massive ($M>1.3\ M_\odot$) accreting white dwarf (WD). We detected this nova as part of the near daily iPTF monitoring of M31 to a depth of $R\approx 21$\,mag and triggered optical photometry, spectroscopy and soft X-ray monitoring of the outburst. Peaking at an absolute magnitude of $M_R=-6.6$ mag, and with a decay time of 1 mag per...
Topics: High Energy Astrophysical Phenomena, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1401.2426
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64
Sep 17, 2013
09/13
by
Carol J. Lonsdale; Harding E. Smith; Michael Rowan-Robinson; Jason Surace; David Shupe; Cong Xu; Seb Oliver; Deborah Padgett; Fan Fang; Alberto Franceschini; Nick Gautier; Matt Griffin; Frank Masci; Glenn Morrison; JoAnn O'Linger; Ismael Perez-Fournon; Marguerite Pierre; Richard Puetter; Gordon Stacey
texts
eye 64
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The SIRTF Wide-area InfraRed Extragalactic survey (SWIRE), the largest SIRTF Legacy program, is a wide-area, imaging survey to trace the evolution of dusty, star-forming galaxies, evolved stellar populations, and AGN as a function of environment, from redshifts z~3 to the current epoch. SWIRE will survey 7 high-latitude fields, totaling 60 - 65 sq. deg. in all 7 SIRTF bands: IRAC 3.6, 4.5, 5.6, 8 microns and MIPS 24, 70, 160 microns. The Legacy Extragalactic Catalog may contain in excess of 2...
Source: http://arxiv.org/abs/astro-ph/0305375v1
47
47
Sep 23, 2013
09/13
by
Michael A. Dopita; Lee Armus; Lisa J. Kewley; Jeff A. Rich; Dave Sanders; Phillip N. Appleton; Ben H. P. Chan; Vassilis Charmandaris; Aaron S. Evans; David T. Frayer; Justin H. Howell; Hanae Inami; Joseph A. Mazzarella; Andreea Petric; Sabrina Stierwalt; Jason Surace
texts
eye 47
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This paper describes a pilot study into the spectral energy distribution (SED) fitting and the derivation of physical parameters for 19 galaxies observed as part of the Great Observatories All-sky LIRG Survey (GOALS) survey as observed with the \emph{Spitzer Space Telescope}. For this we have used the pan-spectral fitting tools developed in a series of papers by Dopita and his co-workers. We show that the standard Lee and Draine `astronomical silicate' model cannot provide a good fit to the...
Source: http://arxiv.org/abs/1012.2174v1
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47
Jul 20, 2013
07/13
by
Payam Davoodi; Seb Oliver; Maria del Carmen Polletta; Michael Rowan-Robinson; Richard S. Savage; Ian Waddington; Duncan Farrah; Tom Babbedge; Carol Lonsdale; Tracey Evans; Fan Fang; Eduardo Gonzalez-Solares; Tom Jarrett; David L. Shupe; Brian Siana; Harding E. Smith; Jason Surace; C. Kevin Xu
texts
eye 47
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We fit a parametric model comprising a mixture of multi-dimensional Gaussian functions to the 3.6 to 8um colour and optical photo-z distribution of galaxy populations in the ELAIS-N1 and Lockman Fields of SWIRE. For 16,698 sources in ELAIS-N1 we find our data are best modelled (in the sense of the Bayesian Information Criterion) by the sum of four Gaussian distributions or modes (C_a, C_b, C_c and C_d). We compare the fit of our empirical model with predictions from existing semi-analytic and...
Source: http://arxiv.org/abs/astro-ph/0604429v1
5
5.0
Jun 29, 2018
06/18
by
James G. Ingalls; J. E. Krick; S. J. Carey; John R. Stauffer; Patrick J. Lowrance; Carl J. Grillmair; Derek Buzasi; Drake Deming; Hannah Diamond-Lowe; Thomas M. Evans; G. Morello; Kevin B. Stevenson; Ian Wong; Peter Capak; William Glaccum; Seppo Laine; Jason Surace; Lisa Storrie-Lombardi
texts
eye 5
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We examine the repeatability, reliability, and accuracy of differential exoplanet eclipse depth measurements made using the InfraRed Array Camera (IRAC) on the Spitzer Space Telescope during the post-cryogenic mission. We have re-analyzed an existing 4.5 {\mu}m data set, consisting of 10 observations of the XO-3b system during secondary eclipse, using seven different techniques for removing correlated noise. We find that, on average, for a given technique, the eclipse depth estimate is...
Topics: Earth and Planetary Astrophysics, Astrophysics, Instrumentation and Methods for Astrophysics
Source: http://arxiv.org/abs/1601.05101
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54
Sep 21, 2013
09/13
by
Adam G. Riess; Peter E. Nugent; Brian P. Schmidt; John Tonry; Mark Dickinson; Ronald L. Gilliland; Rodger I. Thompson; Tamas Budavari; Stefano Casertano; Aaron S. Evans; Alexei V. Filippenko; Mario Livio; David B. Sanders; Alice E. Shapley; Hyron Spinrad; Charles C. Steidel; Daniel Stern; Jason Surace; Sylvain Veilleux
texts
eye 54
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We present photometric observations of an apparent Type Ia supernova (SN Ia) at a redshift of ~1.7, the farthest SN observed to date. SN 1997ff, was discovered in a repeat observation by the HST of the HDF-), and serendipitously monitored with NICMOS on HST throughout the GTO campaign. The SN type can be determined from the host galaxy type:an evolved, red elliptical lacking enough recent star formation to provide a significant population of core-collapse SNe. The class- ification is further...
Source: http://arxiv.org/abs/astro-ph/0104455v1
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20
Jun 28, 2018
06/18
by
Tracy Webb; Allison Noble; Andrew DeGroot; Gillian Wilson; Adam Muzzin; Nina Bonaventura; Mike Cooper; Anna Delahaye; Ryan Foltz; Chris Lidman; Jason Surace; H. K. C Yee; Scott Chapman; Loretta Dunne; James Geach; Brian Hayden; Hendrik Hildebrandt; Jiasheng Huang; Alexandra Pope; Matthew W. L. Smith; Saul Perlmutter; Alex Tudorica
texts
eye 20
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We have discovered an optically rich galaxy cluster at z=1.7089 with star formation occurring in close proximity to the central galaxy. The system, SpARCS104922.6+564032.5, was detected within the Spitzer Adaptation of the red-sequence Cluster Survey, (SpARCS), and confirmed through Keck-MOSFIRE spectroscopy. The rest-frame optical richness of Ngal(500kpc) = 30+/-8 implies a total halo mass, within 500kpc, of ~3.8+/-1.2 x 10^14 Msun, comparable to other clusters at or above this redshift. There...
Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1508.04982
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41
Sep 19, 2013
09/13
by
C. Kevin Xu; David Shupe; Veronique Buat; Michael Rowan-Robinson; Jorge Iglesias-Páramo; Tsutomu T. Takeuchi; Tom A. Barlow; Tim Conrow; Fan Fang; Karl Forster; Peter G. Friedman; Eduardo Gonzales-Solares; Carol Lonsdale; D. Christopher Martin; Patrick Morrissey; Susan G. Neff; David Schiminovich; Mark Seibert; Todd Small; Gene Smith; Jason Surace; Ted Wyder
texts
eye 41
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We study dust attenuation and stellar mass of $\rm z\sim 0.6$ star-forming galaxies using new SWIRE observations in IR and GALEX observations in UV. Two samples are selected from the SWIRE and GALEX source catalogs in the SWIRE/GALEX field ELAIS-N1-00 ($\Omega = 0.8$ deg$^2$). The UV selected sample has 600 galaxies with photometric redshift (hereafter photo-z) $0.5 \leq z \leq 0.7$ and NUV$\leq 23.5$ (corresponding to $\rm L_{FUV} \geq 10^{9.6} L_\sun$). The IR selected sample contains 430...
Source: http://arxiv.org/abs/astro-ph/0701737v2
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45
Sep 22, 2013
09/13
by
Michael Rowan-Robinson; Carol Lonsdale; Gene Smith; Jason Surace; Dave Shupe; Maria Polletta; Brian Siana; Tom Babbedge; Seb Oliver; Ismael Perez-Fournon; Alberto Franceschini; Alejandro Afonso Luis; David Clements; Payam Davoodi; Donovan Domingue; Andreas Efstathiou; Fan Fang; Duncan Farrah; Dave Frayer; Evanthia Hatziminaoglou; Eduardo Gonzalez-Solares; Kevin Xu; Deborah Padgett; Mattia Vaccari
texts
eye 45
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We discuss spectral energy distributions, photometric redshifts, redshift distributions, luminosity functions, source-counts and the far infrared to optical luminosity ratio for sources in the SWIRE Legacy Survey. The spectral energy distributions of selected SWIRE sources are modelled in terms of a simple set of galaxy and quasar templates in the optical and near infrared, and with a set of dust emission templates (cirrus, M82 starburst, Arp 220 starburst, and AGN dust torus) in the mid...
Source: http://arxiv.org/abs/astro-ph/0603737v1
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111
Jul 20, 2013
07/13
by
Fan Fang; David L. Shupe; Gillian Wilson; Mark Lacy; Dario Fadda; Tom Jarrett; Frank Masci; P. N. Appleton; Lee Armus; Scott Chapman; Philip I. Choi; D. T. Frayer; Ingolf Heinrichsen; George Helou; Myungshin Im; Francine R. Marleau; B. T. Soifer; Gordon K. Squires; L. J. Storrie-Lombardi; Jason Surace; Harry I. Teplitz; Lin Yan
texts
eye 111
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We present the first results of the angular auto-correlation function of the galaxies detected by the Infrared Array Camera (IRAC) instrument in the First Look Survey (FLS) of the Spitzer Space Telescope. We detect significant signals of galaxy clustering within the survey area. The angular auto-correlation function of the galaxies detected in each of the four IRAC instrument channels is consistent with a power-law form $w(\theta)=A\theta^{1-\gamma}$ out to $\theta = 0.2\arcdeg$, with the slope...
Source: http://arxiv.org/abs/astro-ph/0406589v1
